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5-6
5 Service
digital
POWER SUPPLY
Periodically check that the vent openings are
not blocked and there is no dust buildup on the
vent openings.
CAUTION:
To reduce the risk of
electric shock, do not disas-
semble the power supply. Re-
fer servicing to qualified service
personnel.
Power Supply Connections
Both connectors must be attached to the back
of the BMX
digital mainframe and the power sup-
ply. See page 2-4 for additional details.
5-pin Connector
Pin Signal
Wire Color
1
+48 V
Red
2
+48 V
Yellow
3
Shield
Clear cover
4
+48 V Return
Black
5
+48 V Return
Blue with Black Stripe
4-pin Connector
Pin Signal
Wire Color
1
Power Supply 1 Collector
Orange
2
Power Supply 1 Emitter
Brown
3
Power Supply 2 Collector
Blue
4
Power Supply 2 Emitter
Red with Black Stripe
BACKUP BATTERIES
A “Keep Alive” voltage is generated by three AA
nickel cadmium (NiCad) batteries (supplied in the
tool kit). These batteries supply a voltage, to hold
each module’s logic state during power outages,
so the console powers back up in the same state it
was in when power was lost. For information on
installing these batteries, see pages 2-4 and 2-5.
4 3 2 1
5 4 3 2 1
Meter Number Table for DSW1
DSW1 is next to the ribbon cable connector (J3). Set only
one DSW1 switch to On, per the above table. Move switch
away from the J3 connector to set to On.
SWITCH ON (set to the left)
Auxiliary Meter
PGM / UTL Meter 4 / BMXd-8 Meter
PGM / UTL Meter 3
PGM / UTL Meter 2
PGM / UTL Meter 1
1
2 3 4
5
METER
PCA
